{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:19:29Z","timestamp":1760149169195,"version":"build-2065373602"},"reference-count":37,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2023,7,14]],"date-time":"2023-07-14T00:00:00Z","timestamp":1689292800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51874164"],"award-info":[{"award-number":["51874164"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Entry retaining via roof cutting is a new longwall mining method that has emerged in recent years, and is characterized by high resource utilization and environmental friendliness. Due to the complexity of this method, a field study is commonly employed for process optimization. Roof blasting is a key operation for retaining the entry, and the current practice involves dynamically adjusting blasting parameters through on-site testing and postblasting monitoring. However, the existing literature lacks detailed descriptions of blasting operations, making it difficult for field engineers to replicate the results. In this study, based on a roof cutting project for entry retaining, a preliminary design of blasting parameters is made based on theories and on-site geological conditions. The on-site test methods and equipment for roof-cutting blasting are described in detail, and the fractural patterns under different blasting parameters are analyzed. After the retreat of the working face, the state of roof caving in the goaf is analyzed based on monitoring data, and the effectiveness of top cutting is evaluated through reverse analysis, leading to dynamic adjustments of the blasting parameters. This research provides a reproducible construction method for roof-cutting operations and establishes the relationship between blasting parameters and post-mining monitoring data. It contributes to the development of fundamental theories and systematic technical systems for entry retaining via roof cutting, offering high-quality case studies for similar geological engineering projects.<\/jats:p>","DOI":"10.3390\/s23146391","type":"journal-article","created":{"date-parts":[[2023,7,14]],"date-time":"2023-07-14T08:40:06Z","timestamp":1689324006000},"page":"6391","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Preliminary Design and On-Site Testing Methodology of Roof-Cutting for Entry Retaining in Underground Coal Mine"],"prefix":"10.3390","volume":"23","author":[{"given":"Ying","family":"Chen","sequence":"first","affiliation":[{"name":"College of Mining, Liaoning Technical University, Fuxin 123000, China"}]},{"given":"Zikai","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Mining, Liaoning Technical University, Fuxin 123000, China"}]},{"given":"Shiji","family":"Bao","sequence":"additional","affiliation":[{"name":"College of Mining, Liaoning Technical University, Fuxin 123000, China"}]},{"given":"Hongtao","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Mining, Liaoning Technical University, Fuxin 123000, China"}]},{"given":"Mingzhe","family":"Shi","sequence":"additional","affiliation":[{"name":"College of Mining, Liaoning Technical University, Fuxin 123000, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9801-4459","authenticated-orcid":false,"given":"Chen","family":"Cao","sequence":"additional","affiliation":[{"name":"College of Mining, Liaoning Technical University, Fuxin 123000, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"483","DOI":"10.1016\/j.jrmge.2015.07.002","article-title":"Longwall mining \u201ccutting cantilever beam theory\u201d and 110 mining method in China: The third mining science innovation","volume":"7","author":"He","year":"2015","journal-title":"J. Rock Mech. Geotech. Eng."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1016\/j.jrmge.2014.04.005","article-title":"Latest progress of soft rock mechanics and engineering in China","volume":"6","author":"He","year":"2014","journal-title":"J. Rock Mech. Geotech. Eng."},{"key":"ref_3","first-page":"839","article-title":"Analysis and application in controlling surrounding rock of support reinforced roadway in gob-side entry with fully mechanized mining","volume":"20","author":"Deng","year":"2010","journal-title":"Int. J. Min. Sci. Technol."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Gao, Y., Liu, D., Zhang, X., and He, M. (2017). Analysis and optimization of entry stability in underground longwall mining. Sustainability, 9.","DOI":"10.3390\/su9112079"},{"key":"ref_5","unstructured":"Weng, M., Su, S., Sun, R., Xie, F., Ding, G., and Xia, Y. Research on Rock burst generation mechanism and three-level collaborative control technology of multi-key strata narrow coal pillar. J. China Coal Soc., 2023."},{"key":"ref_6","first-page":"99","article-title":"Control of rockburst induced by coal pillar and hard-thick roof strata","volume":"54","author":"Sun","year":"2022","journal-title":"Coal Eng."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Wang, Y., Gao, Y., Wang, E., He, M., and Yang, J. (2018). Roof deformation characteristics and preventive techniques using a novel non-pillar mining method of gob-side entry retaining by roof cutting. Energies, 11.","DOI":"10.3390\/en11030627"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.ijrmms.2018.01.013","article-title":"The reasonable breaking location of overhanging hard roof for directional hydraulic fracturing to control strong strata behaviors of gob-side entry","volume":"103","author":"Huang","year":"2018","journal-title":"Int. J. Rock Mech. Min. Sci."},{"key":"ref_9","first-page":"1161","article-title":"Study on coupling support technique in the roadway of Hecaogou no. 2 coal mine with soft roadway of large deformation","volume":"36","author":"Guo","year":"2018","journal-title":"Geotech. Geol. Eng."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/j.ijrmms.2015.03.025","article-title":"Design and construction of entry retaining wall along a gob side under hard roof stratum","volume":"77","author":"Tan","year":"2015","journal-title":"Int. J. Rock Mech. Min. Sci."},{"key":"ref_11","first-page":"1027","article-title":"Stability analysis on main roof key block B in large mining height workface","volume":"34","author":"Fu","year":"2019","journal-title":"J. China Coal Soc."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1041","DOI":"10.1007\/s00603-015-0783-1","article-title":"Numerical investigation of the effect of the location of critical rock block fracture on crack evolution in a gob-side filling wall","volume":"49","author":"Li","year":"2016","journal-title":"Rock Mech. Rock Eng."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"238","DOI":"10.1007\/s12404-012-0303-9","article-title":"Experimental study on supporting technology of gob-side entry with different roof conditions","volume":"18","author":"Luo","year":"2012","journal-title":"J. Coal Sci. Eng."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"207","DOI":"10.3724\/SP.J.1235.2011.00207","article-title":"Deformation characteristics and reinforcement technology for entry subjected to mining-induced stresses","volume":"3","author":"Kang","year":"2011","journal-title":"J. Rock Mech. Geotech. Eng."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2447","DOI":"10.1007\/s00603-015-0713-2","article-title":"Roof deformation, failure characteristics, and preventive techniques of gob-side entry driving heading adjacent to the advancing working face","volume":"48","author":"Bai","year":"2015","journal-title":"Rock Mech. Rock Eng."},{"key":"ref_16","first-page":"511","article-title":"Research on the technique of no-pillar mining with gob-side entry formed by advanced roof caving in the protective seam in Baijiao coal mine","volume":"28","author":"Zhang","year":"2011","journal-title":"J. Min. Saf. Eng."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.ijrmms.2015.09.001","article-title":"An innovative approach for gob-side entry retaining in highly gassy fully-mechanized longwall top-coal caving","volume":"80","author":"Zhang","year":"2015","journal-title":"Int. J. Rock Mech. Min. Sci."},{"key":"ref_18","first-page":"80","article-title":"Research on the technology of roof cutting and pressure relief in the Shendong mining area","volume":"44","author":"Song","year":"2016","journal-title":"Coal Sci. Technol."},{"key":"ref_19","first-page":"17","article-title":"Research on optimization of parameters for cutting top concentrated energy blasting in suburban mines","volume":"35","author":"Chen","year":"2016","journal-title":"Coal Technol."},{"key":"ref_20","first-page":"12","article-title":"Coal mining technology without coal pillars for cutting roof, relieving pressure and retaining roadways along the gob in TangshanGou Coal Mine","volume":"48","author":"Mao","year":"2016","journal-title":"Coal Eng."},{"key":"ref_21","first-page":"28","article-title":"Research on the application of goaf retaining technology in the 1200 working face of Zhongxing Coal Mine","volume":"36","author":"Sun","year":"2017","journal-title":"Coal Technol."},{"key":"ref_22","first-page":"56","article-title":"Research on the parameters of top cutting blasting in Zhongxing Mine","volume":"36","author":"Han","year":"2017","journal-title":"Coal Technol."},{"key":"ref_23","first-page":"72","article-title":"Application of pre splitting and roof cutting pressure relief technology in the return air roadway of the 50104 working face of Hecaogou Coal Mine","volume":"49","author":"Chen","year":"2017","journal-title":"Coal Eng."},{"key":"ref_24","first-page":"1894","article-title":"State-of-the-art occurrence mechanism and hazard control of mining tremors and their challenges in Chinese coal mines","volume":"48","author":"Cao","year":"2023","journal-title":"J. China Coal Soc."},{"key":"ref_25","first-page":"1861","article-title":"Theory and technical framework of coal mine rock burst origin prevention","volume":"48","author":"Qi","year":"2023","journal-title":"J. China Coal Soc."},{"key":"ref_26","first-page":"557","article-title":"Analysis of key block B in the structure of voussoir beam in longwall mining","volume":"19","author":"Qian","year":"1994","journal-title":"J China Coal Soc."},{"key":"ref_27","first-page":"10","article-title":"Rational width of narrow coal pillar based on the fracture line location of key rock B in main roof","volume":"31","author":"Wang","year":"2014","journal-title":"J. Min. Saf. Eng."},{"key":"ref_28","first-page":"3059","article-title":"Influence factors on stability of surrounding rocks of gob-side entry retaining in top-coal caving mining face","volume":"23","author":"Xie","year":"2004","journal-title":"China J. Rock Mech. Eng."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"3293","DOI":"10.1007\/s00603-016-0970-8","article-title":"Stress changes and deformation monitoring of longwall coal pillars located in weak ground","volume":"49","author":"Yu","year":"2016","journal-title":"Rock Mech. Rock Eng."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"241","DOI":"10.1016\/j.coal.2008.05.004","article-title":"Sensitivity analysis of support safety factor for predicting the effects of contributing parameters on roof falls in underground coal mines","volume":"75","author":"Palei","year":"2008","journal-title":"J. Int. J. Coal Geol."},{"key":"ref_31","unstructured":"Ministry of Emergency Management of the People\u2019s Republic of China (2022). Safety Regulations in Coal Mine, Emergency Management Press."},{"key":"ref_32","unstructured":"(2014). Safety Regulations for Blasting (Standard No. GB6722-2014)."},{"key":"ref_33","first-page":"829","article-title":"Coupling mechanism of roof and supporting wall in gob-side entry retaining in fully-mechanized mining with gangue backfilling","volume":"21","author":"Ma","year":"2011","journal-title":"Int. J. Min. Sci. Technol."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1016\/j.tust.2017.08.023","article-title":"Prediction of relative displacement for entry roof with weak plane under the effect of mining abutment stress","volume":"71","author":"Shen","year":"2018","journal-title":"Tunn. Undergr. Space Technol."},{"key":"ref_35","first-page":"1","article-title":"Factor analysis on deformation of gob-side entry retaining with entry-in packing in top-coal caving mining face","volume":"35","author":"Zhang","year":"2006","journal-title":"J. China Univ. Min. Technol."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Zhao, T., Zhang, Y., Zhang, Z., Li, Z., and Ma, S. (2017). Deformation monitoring of waste-rock-backfilled mining gob for ground control. Sensors, 17.","DOI":"10.3390\/s17051044"},{"key":"ref_37","first-page":"1957","article-title":"Risk identification formula for coal burst occurrence and its application","volume":"48","author":"Pan","year":"2023","journal-title":"J. China Coal Soc."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/14\/6391\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T20:11:49Z","timestamp":1760127109000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/14\/6391"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,7,14]]},"references-count":37,"journal-issue":{"issue":"14","published-online":{"date-parts":[[2023,7]]}},"alternative-id":["s23146391"],"URL":"https:\/\/doi.org\/10.3390\/s23146391","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2023,7,14]]}}}