大同矿区特厚煤层综放回采巷道强矿压显现机制及控制技术

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (0 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为保证大同矿区特厚煤层开采过程中临空巷道超前支护段的稳定性与可用性，采用理论分析与现场实测相结合的方法，得到巷道超前支护段的强矿压显现机制。研究表明：侏罗系煤层采空区区段煤柱应力集中影响区深度仅50～70 m，不足以影响石炭系工作面回采巷道的强矿压显现；石炭系工作面临空巷超前支护段的强矿压显现，主要受工作面采动超前支承压力及相邻工作面采空区悬顶的双向高支承压力的影响，且当工作面过上覆煤层采空区边界煤柱后，侏罗系煤层顶板大结构被重新激活，再次运动失稳，加剧了临空巷道的强矿压显现。提出并实施巷道顶板水压致裂有效控制技术，对同忻矿8105工作面5105临空巷实施定向高压水力致裂，实现巷道围岩高应力的转移，大大降低了临空巷超前支护段的强矿压显现强度，取得良好的临空巷卸压效果，保证了特厚煤层综放工作面的正常生产。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：采矿工程, 特厚煤层, 巷道强矿压, 双向压力, 应力转移, 水压致裂

Abstract：To ensure the stability and working of the advance supported roadway on gob side at the extra-thick seam zone during the mining process in Datong mine，a combined method of theoretical analysis and field measurement was used to obtain the pressure behavior of the forepoling segment of the roadway. The results of the research showed that the depths affected by the stress concentration zone of the coal pillar at mined-out section of Jurassic period were only 50–70 m，not deep enough to affect the occurrence of the strata pressure at the working face of the advance supported roadway in Carboniferous period. The occurrence of the strong strata pressure at the advance supported roadway in Carboniferous period was mainly affected by the abutment pressure due to mining and the high bearing pressure of overhang roof on two sides of the adjacent mined-out area. When the working front passed the boundary pillar of the mined-out area of the overlying coal，the big seam roof structure in Jurassic period was reactivated and tended to be unstable again，which speeded up the occurrence of the strong strata pressure of the roadway approaching the mined-out area. An effective control technology with the orientated high-pressure hydraulic fracturing of roadway roof was proposed and applied to the working front 8105 in the roadway 5105 approaching the mined-out area in Tongxin mine. The technology achieved the high stress transfer in the surrounding rock of roadway and greatly reduced the strong strata pressure of advance supported roadway approaching mined-out area.

Key words： mining engineering extra-thick coal seam roadway strong pressure two-dimensional pressure stress transfer hydraulic fracturing

收稿日期: 2014-04-28

引用本文:

于斌1，刘长友2，刘锦荣1. 大同矿区特厚煤层综放回采巷道强矿压显现机制及控制技术[J]. 岩石力学与工程学报, 2014, 33(09): 1863-1872.
YU Bin1，LIU Changyou2，LIU Jinrong1. MECHANISM AND CONTROL TECHNOLOGY OF PRESSURE OCCURENCE IN ROADWAY WITH EXTRA THICKNESS AND MECHANIZED CAVING COAL SEAM IN DATONG MINING AREA. , 2014, 33(09): 1863-1872.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/I09/1863

[1]	于斌. 大同矿区综采40 a开采技术研究[J]. 煤炭学报，2010，35(11)：1 772-1 777.(YU Bin. Study on fully mechanized coal mining technology in passed 40 years in Datong mining area[J]. Journal of China Coal Society，2010，35(11)：1 772-1 777.(in Chinese)) " target="_blank">
[5]	王卫军，侯朝炯. 回采巷道煤柱与底板稳定性分析[J]. 岩土力学，2003，24(1)：75-78.(WANG Weijun，HOU Chaojiong. Stability analysis of coal pillar and immediate bottom of extraction opening[J]. Rock and Soil Mechanics，2003，24(1)：75-78.(in Chinese))
[6]	巩克玉，单传杰. 煤柱下巷道的矿压显现及机制及控制[J]. 矿山压力与顶板管理，2001，(4)：20-21.(GONG Keyu，SHAN Chuanjie. Ground pressure appeared mechanism and control of roadway under the coal pillar[J]. Ground Pressure and Strata Control，2001，(4)：20-21.(in Chinese)) " target="_blank">
[8]	孙守山，宁宇，葛钧. 波兰煤矿坚硬顶板定向水压致裂技术[J]. 煤炭科学技术，1999，27(2)：51-52.(SUN Shoushan，NING Yu，GE Jun. The technology of hard roof directional hydraulic fracturing in Poland[J]. Coal Science and Technology，1999，27(2)：51-52.(in Chinese)) " target="_blank">
[9]	闫少宏，宁宇，康立军，等. 用水压致裂处理坚硬顶板的机制及实验研究[J]. 煤炭学报，2000，25(1)：32-35.(YAN Shaohong，NING Yu，KANG Lijun，et al. The mechanism of hydro breakage to control hard roof and its test study[J]. Journal of China Coal Society，2000，25(1)：32-35.(in Chinese)) " target="_blank">
[11]	黄炳香，程庆迎，刘长友，等. 煤岩体水力致裂理论及其工艺技术框架[J]. 采矿与安全工程学报，2011，28(2)：167-173.(HUANG Bingxiang，CHENG Qingying，LIU Changyou，et al. Hydraulic fracturing theory of coal-rock mass and its technical framework[J]. Journal of Mining and Safety Engineering，2011，28(2)：167-173.(in Chinese))
[15]	刘品. 可靠性工程基础[M]. 北京：中国计量出版社，2002：9-12.(LIU Pin. Reliability engineering fundamentals[M]. Beijing：China Metrology Publishing House，2002：9-12.(in Chinese)) " target="_blank">
[7]	刘宝琛，沈惠群. 留设建筑物保护煤柱最佳尺寸的数学模型及求解[J]. 煤炭学报，1988，13(3)：18-25.(LIU Baochen，SHEN Huiqun. The mathematical model and solution for optimization of coal pillar for preventing building[J]. Journal of China Coal Society，1988，13(3)：18-25.(in Chinese))
[2]	弓培林，靳钟铭. 大采高综采采场顶板控制力学模型研究[J]. 岩石力学与工程学报，2008，27(1)：193-198.(GONG Peilin，JIN Zhongming. Mechanical model study on roof control for fully-mechanized coal face with large mining height[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(1)：193-198.(in Chinese))
[3]	杨敬轩，刘长友，杨宇，等. 浅埋近距离煤层房柱采空区下顶板承载及房柱尺寸[J]. 中国矿业大学学报，2013，42(2)：161-168. (YANG Jingxuan，LIU Changyou，YANG Yu，et al. Study of the bearing mechanism of the coal roof and the dimension selection of the room and pillar in the shallow and close distance coal seam[J]. Journal of China University of Mining and Technology，2013，42(2)：161-168.(in Chinese))
[4]	郝海金，吴健，张勇，等. 大采高开采上位岩层平衡结构及其对采场矿压显现的影响[J]. 煤炭学报，2004，29(2)：137-141. (HAO Haijin，WU Jian，ZHANG Yong，et al. The balance structure of main roof and its action to immediate roof in large cutting height workface[J]. Journal of China Coal Society，2004，29(2)：137-141. (in Chinese))
[10]	邓广哲，王世斌，黄炳香. 煤岩水压裂缝扩展行为特性研究[J]. 岩石力学与工程学报，2004，23(20)：3 489-3 493.(DENG Guangzhe，WANG Shibing，HUANG Bingxiang. Research on behavior character of crack development induced by hydraulic fracturing in coal-rockmass[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(20)：3 489-3 493.(in Chinese))
[12]	刘长友，黄炳香，孟祥军，等. 超长孤岛综放工作面支承压力分布规律研究[J]. 岩石力学与工程学报，2007，26(增1)：2 671-2 676. (LIU Changyou，HUANG Bingxiang，MENG Xiangjun，et al. Research on abutment pressure distribution law of over length isolated fully-mechanized top coal caving face[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：2 671-2 676.(in Chinese))
[13]	谢广祥，杨科，刘全明. 综放面倾向煤柱支承压力分布规律研究[J]. 岩石力学与工程学报，2006，25(3)：545-549.(XIE Guangxiang，YANG Ke，LIU Quanming. Study on distribution laws of stress in inclined coal pillar for fully-mechanized top-coal caving face[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：545-549.(in Chinese))
[14]	于斌，刘长友，杨敬轩，等. 大同矿区双系煤层开采煤柱影响下的强矿压显现机制[J]. 煤炭学报，2014，39(1)：40-46.(YU Bin，LIU Changyou，YANG Jingxuan，et al. The mechanism of strong pressure reveal under the influence of mining dual system of coal pillar in Datong mining area[J]. Journal of China Coal Society，2014，39(1)：40-46.(in Chinese))