A new model of surface and underground integrated three-dimensional prevention and control of rock burst in Binchang Mining Area

Authors

WU Xueming, Shaanxi Binchang Mining Group Co., Ltd., Xianyang 712000, China; Binchang Mining Area Disaster Comprehensive Control Engineering Research Center, Xianyang 713602, ChinaFollow
MA Xiaohui, Shaanxi Binchang Mengcun Mining Co., Ltd., Xianyang 713600, China
LYU Dazhao, Shaanxi Binchang Mengcun Mining Co., Ltd., Xianyang 713600, China
ZHENG Kaige, CCTEG Xi’an Research Institute(Group) Co., Ltd., Xi’an 710077, China
WANG Dongjie, Shaanxi Binchang Mengcun Mining Co., Ltd., Xianyang 713600, China

Abstract

With the continuous increase of coal mining intensity, the mine gradually moves to the deep, bringing about increasingly serious rock burst hazard. The deep rock burst mines often have one or more layers of hard and thick rock strata. These hard roofs are thick and strong integrity. When they suddenly rupture, they can release a large amount of elastic energies, which can easily to cause rock burst accidents and seriously restrict the safety of mine production. Herein, appropriate treatment measures were put forward for the special situation of deep burial depth of coal seam and general presence of many kinds of hard and thick rock strata in Mengcun Coal Mine in Binchang Mining Area, Shaanxi Province. These measure include: (1) Breaking and weakening treatment should be provided for the hard and thick rock strata with a thickness over 10 m within the range of 0‒80 m above the roof. (2) The roof deep-hole pre-split blasting measure should be taken for the low-level rock strata within the range of 0‒30 m above the coal seam. (3) The roof directional long-borehole hydraulic fracturing should be conducted to the middle-level hard rock strata within the range of 30‒60 m above the coal seam, and the staged fracturing of surface horizontal well should be performed for the high-level hard rock strata over 60 m above the coal seam. In this way, the fractures generated in the high, middle and low-level roof can be penetrated vertically, and thus the roof can be “cut” into a relatively regular “block” structure, so that the stress in the overlying strata can be transformed from “hard transmission” to “soft transmission”. Meanwhile, combined with the coal seam pressure relief measures such as large-diameter pressure relief and coal seam blasting, a surface and underground integrated three-dimensional prevention and control mode is formed, which integrates the regional and local areas, having the coal seam and rock stratum fully covered. The engineering practice has proved that: after the implementation of the 3D prevention and control mode, the microseismic events above 10³ J in the regional working face are reduced by 88%, the periodic weighting intensity is reduced by 23%, the weighting duration is shortened by 61%, and the anti-scour effect is good. Generally, the successful application of this technical model could provide a reference for the treatment of rock burst mine disasters under similar geological conditions.

Keywords

rock burst, “surface and underground” integrated three-dimensional prevention and control, staged fracturing, directional long-borehole, hydraulic fracturing, coal seam pressure relief, strength weakening of coal and rock

DOI

10.12363/issn.1001-1986.22.08.0640

Recommended Citation

WU Xueming, MA Xiaohui, LYU Dazhao, et al. (2023) "A new model of surface and underground integrated three-dimensional prevention and control of rock burst in Binchang Mining Area," Coal Geology & Exploration: Vol. 51: Iss. 3, Article 46.
DOI: 10.12363/issn.1001-1986.22.08.0640
Available at: https://cge.researchcommons.org/journal/vol51/iss3/46

Reference

[1] 窦林名,田鑫元,曹安业,等. 我国煤矿冲击地压防治现状与难题[J]. 煤炭学报,2022,47(1):152−171.

DOU Linming,TIAN Xinyuan,CAO Anye,et al. Present situation and problems of coal mine rock burst prevention and control in China[J]. Journal of China Coal Society,2022,47(1):152−171.

[2] 姜耀东,潘一山,姜福兴,等. 我国煤炭开采中的冲击地压机理和防治[J]. 煤炭学报,2014,39(2):205−213.

JIANG Yaodong,PAN Yishan,JIANG Fuxing,et al. State of the art review on mechanism and prevention of coal bumps in China[J]. Journal of China Coal Society,2014,39(2):205−213.

[3] 王同旭,周永晖,江东海. 坚硬顶板断裂释放能量及其对煤层扰动影响研究[J]. 山东科技大学学报(自然科学版),2022,41(4):30−38.

WANG Tongxu,ZHOU Yonghui,JIANG Donghai. Study on energy released from hard roof fracture and its influence on coal seam disturbance[J]. Journal of Shandong University of Science and Technology (Natural Science),2022,41(4):30−38.

[4] 郑凯歌,王林涛,李彬刚,等. 坚硬顶板强矿压动力灾害演化机理与超前区域防治技术[J]. 煤田地质与勘探,2022,50(8):62−71.

ZHENG Kaige,WANG Lintao,LI Bingang,et al. Dynamic disaster evolution mechanism of high mine pressure at hard roof and advance area prevention and control technology[J]. Coal Geology & Exploration,2022,50(8):62−71.

[5] 杨俊哲,王振荣,吕情绪,等. 坚硬顶板超前区域治理技术在神东布尔台煤矿的应用[J]. 煤田地质与勘探,2022,50(2):17−23.

YANG Junzhe,WANG Zhenrong,LYU Qingxu,et al. Application of advanced regional treatment technology of hard roof in Buertai Coal Mine of Shendong Coal Group[J]. Coal Geology & Exploration,2022,50(2):17−23.

[6] 钟坤,陈卫忠,赵武胜,等. 煤矿坚硬顶板分段水力压裂防冲效果监测与评价[J]. 中南大学学报(自然科学版),2022,53(7):2582−2593.

ZHONG Kun,CHEN Weizhong,ZHAO Wusheng,et al. Monitoring and evaluation of segmented hydraulic fracturing effect in rock burst prevention on hard roof of coal mine[J]. Journal of Central South University (Science and Technology),2022,53(7):2582−2593.

[7] 齐庆新,雷毅,李宏艳,等. 深孔断顶爆破防治冲击地压的理论与实践[J]. 岩石力学与工程学报,2007,26(增刊1):3522−3527.

QI Qingxin,LEI Yi,LI Hongyan,et al. Theory and application of prevention of rock burst by break−tip blast in deep hole[J]. Chinese Journal of Rock Mechanics and Engineering,2007,26(Sup.1):3522−3527.

[8] 齐庆新,潘一山,李海涛,等. 煤矿深部开采煤岩动力灾害防控理论基础与关键技术[J]. 煤炭学报,2020,45(5):1567−1584.

QI Qingxin,PAN Yishan,LI Haitao,et al. Theoretical basis and key technology of prevention and control of coal–rock dynamic disasters in deep coal mining[J]. Journal of China Coal Society,2020,45(5):1567−1584.

[9] 杨佳旻. 厚煤层坚硬顶板工作面冲击地压防治技术[J]. 山东煤炭科技,2022,40(3):151−154.

YANG Jiamin. Prevention and control technology of rock burst in hard roof face of thick coal seam[J]. Shandong Coal Science and Technology,2022,40(3):151−154.

[10] 庞立宁,付书俊,苏波. 煤层大直径钻孔和顶板预裂孔防冲机理研究及应用[J]. 煤矿安全,2021,52(9):183−189.

PANG Lining,FU Shujun,SU Bo. Research and application of anti rock burst mechanism of large diameter boreholes in coal seam and roof pre–splitting holes[J]. Safety in Coal Mines,2021,52(9):183−189.

[11] 潘俊锋,马文涛,刘少虹,等. 坚硬顶板水射流预制缝槽定向预裂防冲技术试验[J]. 岩石力学与工程学报,2021,40(8):1591−1602.

PAN Junfeng,MA Wentao,LIU Shaohong,et al. A prevention technology of rock burst based on directional presplitting of water jet prefabricated slot in hard roof[J]. Chinese Journal of Rock Mechanics and Engineering,2021,40(8):1591−1602.

[12] 于斌,高瑞,夏彬伟,等. 大空间坚硬顶板地面压裂技术与应用[J]. 煤炭学报,2021,46(3):800−811.

YU Bin,GAO Rui,XIA Binwei,et al. Ground fracturing technology and application of hard roof in large space[J]. Journal of China Coal Society,2021,46(3):800−811.

[13] 李全贵,翟成,林柏泉,等. 定向水力压裂技术研究与应用[J]. 西安科技大学学报,2011,31(6):735−739.

LI Quangui,ZHAI Cheng,LIN Baiquan,et al. Research and application of directional hydraulic fracturing technology[J]. Journal of Xi’an University of Science and Technology,2011,31(6):735−739.

[14] 马冰,蒋威. 厚硬顶板定向水力压裂分层垮落技术研究[J]. 煤炭技术,2022,41(4):13−17.

MA Bing,JIANG Wei. Study on directional hydraulic fracturing stratified caving technology in thick and hard roof[J]. Coal Technology,2022,41(4):13−17.

[15] 黄澎涛. 冲击地压关键层远程区域水力压裂防治技术：第二十一届全国探矿工程 (岩土钻掘工程)学术交流年会论文集[C]//大同：中国地质学会，2021：187–194.

[16] 杨亚超,张利军,刘宏煜. 综放工作面初采水力预裂弱化顶板技术实践[J]. 山东煤炭科技,2021,39(9):161−163.

YANG Yachao,ZHANG Lijun,LIU Hongyu. Technical practice of weakening roof by hydraulic pre–splitting in fully mechanized top−coal caving face[J]. Shandong Coal Science and Technology,2021,39(9):161−163.

[17] 赵善坤. 深孔顶板预裂爆破力构协同防冲机理及工程实践[J]. 煤炭学报,2021,46(11):3419−3432.

ZHAO Shankun. Mechanism and application of force–structure cooperative prevention and control on rockburst with deep hole roof pre–blasting[J]. Journal of China Coal Society,2021,46(11):3419−3432.

[18] 杨超,郝其林,李伟,等. 特厚煤层坚硬顶板预裂爆破防冲技术[J]. 煤矿开采,2013,18(5):87−89.

YANG Chao,HAO Qilin,LI Wei,et al. Technology of roof pre–split blasting for preventing rock–burst in extremely–thick coalseam roadway with strong rock–burst danger[J]. Coal Mining Technology,2013,18(5):87−89.

[19] 田昭军,王永,冯美华. 冲击地压煤层爆破卸压效果分析[J]. 能源与环保,2018,40(9):54−58.

TIAN Zhaojun,WANG Yong,FENG Meihua. Effect analysis of pressure relief using blasting of coal seam with rock burst danger[J]. China Energy and Environmental Protection,2018,40(9):54−58.

[20] 李国玉,李田华. 大直径钻孔卸压技术防治巷道冲击危险的研究应用[J]. 中国煤炭,2016,42(12):76−80.

LI Guoyu,LI Tianhua. Research and application on with large–diameter drillhole pressure relief technology for preventing roadway rock burst[J]. China Coal,2016,42(12):76−80.