Measurement of stress-relief zone width of roadway by borehole gas continuous flow method

doi:10.16265/j.cnki.issn1003-3033.2020.03.013

Abstract

Abstract: In order to accurately measure the width of stress-relief zone ahead of roadway working face, borehole gas continuous flow method was proposed based on the relationship between gas flow discharged from coals and in-suit stress, and its feasibility was verified theoretically. Then, borehole gas flow was measured in 2303 ventilating roadway of Xuehu coal mine by using outburst prediction device. The results show that gas flow increases first and then decreases with its peak being the boundary of stress-relief zone, and the width of the zone ahead of working face is determined to be 9-10 meter. Meanwhile, that measured by using drillings amount and drillings gas absorption index Δh₂ is 9.5-10 meter, consistent with results of borehole gas continuous flow method, therefore verifying its reliability in determining width of stress-relief zone.

Key words: outburst, in-situ stress, coal roadway, stress-relief zone width, borehole gas continuous flow method

CLC Number:

X936

TIAN Shixiang, MA Ruishuai, ZOU Yihuai, XU Shiqing, LIN Huaying, YU Zhaoyang. Measurement of stress-relief zone width of roadway by borehole gas continuous flow method[J]. China Safety Science Journal, 2020, 30(3): 82-86.

References

[1] 王雨虹, 刘璐璐, 付华, 等. 基于声发射多参数时间序列的瓦斯突出预测[J]. 中国安全科学学报, 2018, 28(5): 129-134.
WANG Yuhong, LIU Lulu, FU Hua, et al. Research on acoustic emission multi-parameter time series based prediction of gas outburst [J]. China Safety Science Journal, 2018, 28(5): 129-134.
[2] 杜振宇, 薛俊华, 任波, 等. 基于层次-可拓的煤与瓦斯突出预警研究[J]. 煤矿安全, 2018, 49(12): 169-172.
DU Zhenyu, XUE Junhua, REN Bo, et al. Early warning of coal and gas outburst by hierarchical analysis and extension theory[J]. Safety in Coal Mines, 2018, 49(12): 169-172.
[3] TANG Jun, JIANG Chenglin, CHEN Yujia, et al. Line prediction technology for forecasting coal and gas outbursts during coal roadway tunneling[J]. Journal of Natural Gas Science and Engineering,2016, 34: 412-418.
[4] ZENG Jianhua, TIAN Shixiang, WU Guiyi, et al. The research of coal seam gas pressure and initial gas emission characteristics of borehole[J]. Energy Science & Engineering, 2019, 7(5): 1 961-1 969.
[5] 许江, 周文杰, 刘东. 采动影响下突出煤体温度与声发射特性[J]. 煤炭学报, 2013, 38(2): 239-244.
XU Jiang, ZHOU Wenjie, LIU Dong. Temperature and acoustic emission characteristics of coal in the process of outburst under the influence of mining[J]. Journal of China Coal Society, 2013, 38(2): 239-244.
[6] 刘明举, 孟磊, 魏建平. 近年煤与瓦斯突出的统计特性及其防范措施[J]. 煤矿安全, 2009, 40(7): 73-76.
LIU Mingju, MENG Lei, WEI Jianping. Statistical characteristics and preventive measures of coal and gas outburst in recent years[J]. Safety in Coal Mines, 2009, 40(7): 73-76.
[7] 陈鲜展. 地应力对煤与瓦斯突出强度影响研究[J]. 煤炭技术, 2018, 37(7): 159-160.
CHEN Xianzhan. Research on the influence of ground stress on intensity of coal and gas outburst[J]. Coal Technology, 2018,37(7): 159-160.
[8] 曹运兴, 张军胜, 田林, 等. 低渗煤层定向多簇气相压裂瓦斯治理技术研究与实践[J]. 煤炭学报, 2017, 42(10): 2 631-2 641.
CAO Yunxing, ZHANG Junsheng, TIAN Lin, et al. Research and application of CO₂ gas fracturing for gas control in low permeability coal seams[J]. Journal of China Coal Society, 2017, 42(10): 2 631-2 641.
[9] 窦林名, 何学秋, 任婷, 等. 动静载叠加诱发煤岩瓦斯动力灾害原理及防治技术[J]. 中国矿业大学学报, 2018, 47(1): 48-59.
DOU Linming, HE Xueqiu, REN Ting, et al. Mechanism of coal-gas dynamic disasters induced by superposition of static and dynamic loads and its control technology[J]. Journal of China University of Mining and Technology, 2018, 47(1): 48-59.
[10] 左建平, 史月, 刘德军, 等. 深部软岩巷道开槽卸压等效椭圆模型及模拟分析[J]. 中国矿业大学学报, 2019, 48(1): 1-11.
ZUO Jianping, SHI Yue, LIU Dejun, et al. The equivalent elliptic model and simulation analysis of distressing by cutting groove in deep soft rock roadway[J]. Journal of China University of Mining and Technology, 2019, 48(1): 1-11.
[11] 岳帅帅, 谢生荣, 陈冬冬, 等. 15 m特厚煤层综放高强度开采窄煤柱围岩控制研究[J]. 采矿与安全工程学报, 2017, 34(5): 905-913.
YUE Shuaishuai, XIE Shengrong, CHEN Dongdong, et al. Research on surrounding rock control of narrow pillar with high-intensity fully-mechanized tope coal caving mining in 15 m ultra-thick coal seam[J]. Journal of Mining and Safety Engineering, 2017, 34(5): 905-913.
[12] 付帅. 基于钻孔气体漏失量法巷帮卸压带宽度确定研究[J]. 中国安全生产科学技术, 2018, 14(11): 121-126.
FU Shuai. Research on determination of pressure relief range at roadway sidewall based on borehole gas leakage quantity method[J].Journal of Safety Science and Technology, 2018, 14(11): 121-126.
[13] 何学秋, 王恩元, 张仁贵. 利用煤岩破坏电磁辐射特性测定煤岩卸压带的研究[J]. 煤矿安全, 1996,27(2): 17-19.
HE Xueqiu, WANG Enyuan, ZHANG Rengui. Study on the determination of pressure relief zone of coal and rock by electromagnetic radiation characteristics of coal and rock damage[J]. Safety in Coal Mines, 1996,27(2): 17-19.
[14] 张明杰, 付帅, 谭志宏. 单一低透气性煤层采空区卸压带防突范围确定[J]. 煤炭科学技术, 2014, 42(8): 25-28.
ZHANG Mingjie, FU Shuai, TAN Zhihong. Determination on range of stress-relaxed area in goaf of low permeability single coal seam[J]. Coal Science and Technology, 2014, 42(8): 25-28.
[15] 于不凡. 苏联防治煤和瓦斯突出技术近况[J]. 煤炭工程师, 1987(4): 49-54.
YU Bufan. Recent status of coal and gas outburst prevention and control technology in the Soviet Union[J]. Coal Engineer, 1987(4): 49-54.
[16] 田世祥, 蒋承林, 徐乐华. 钻孔初始瓦斯规律研究[J]. 煤矿安全, 2016, 47(5): 14-17, 21.
TIAN Shixiang, JIANG Chenglin, XU Lehua. Research on laws of initial gas emission flow from borehole[J]. Safety in Coal Mines, 2016, 47(5): 14-17, 21.
[17] 唐巨鹏, 陈帅, 李卫军. 考虑有效应力的钻屑量理论分析及试验研究[J]. 岩土工程学报, 2018, 40(1): 130-138.
TANG Jupeng, CHEN Shuai, LI Weijun. Theoretical and experimental studies on drilling cutting weight considering effective stress [J]. Journal of Geotechnical Engineering, 2018, 40(1): 130-138.