利民煤矿井田地应力场反演及分区特征

doi:10.16265/j.cnki.issn1003-3033.2023.S2.0011

中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (S2): 105-110.doi: 10.16265/j.cnki.issn1003-3033.2023.S2.0011

利民煤矿井田地应力场反演及分区特征

董海清¹(), 兰天伟²^,³, 袁永年¹, 令向东¹, 李亚斌¹, 李阳¹

¹ 国家能源集团乌海能源公司内蒙古利民煤焦有限责任公司, 内蒙古鄂尔多斯 016064
² 辽宁工程技术大学鄂尔多斯研究院, 内蒙古鄂尔多斯 017010
³ 辽宁工程技术大学矿业学院, 辽宁阜新 123000

收稿日期:2023-07-10 修回日期:2023-10-12 出版日期:2023-12-30
作者简介:
董海清 (1981—),男,内蒙古乌海人,硕士,高级工程师,主要从事煤矿生产安全技术工作。E-mail:9682131@qq.com。
兰天伟教授
袁永年高级工程师
令向东高级工程师
李亚斌高级工程师
李阳工程师
基金资助:
辽宁省“兴辽英才计划”青年拔尖人才计划项目(XLYC2007042); 辽宁省教育厅基本科研项目(重点项目)(LJKZ0325)

Inversion and zoning characteristics of in-situ stress field in Limin Coal Mine

DONG Haiqing¹(), LAN Tianwei²^,³, YUAN Yongnian¹, LING Xiangdong¹, LI Yabin¹, LI Yang¹

¹ Wuhai Energy Company Inner Mongolia Limin Coal & Coking Co., Ltd., National Energy Group, Ordos Inner Mongolia 016064, China
² Ordos Research Institute, Liaoning University of Engineering and Technology, Ordos Inner Mongolia 017010, China
³ School of Mining, Liaoning University of Engineering and Technology, Fuxin Liaoning 123000, China

Received:2023-07-10 Revised:2023-10-12 Published:2023-12-30

摘要/Abstract

摘要：

为预防矿井采掘过程由应力集中导致的巷道围岩、支护变形和破坏,需要明确井田地应力分布特征。根据区域构造分析和板块构造运动态势,揭示利民煤矿井田应力场形成的动力源及演化特征,通过井田原位地应力测试,确定地应力场主应力方向及量值,得到利民煤矿的水平构造应力场占主要优势,其最大水平主应力方向为S85.78°W—S89.93°W,方向为近EW向,构建9号煤层顶板岩性数据库和岩体应力计算模型,反演井田最大主应力分布特征,并根据应力集中系数对井田进行构造应力分区,分析不同构造应力分区内巷道围岩稳定性的差异。结果表明:高应力分区内围岩变化程度最大,且能量积聚最为集中。巷道围岩产生应力集中的临界尺度更小,更容易发生强矿压显现情况。

关键词: 地应力, 构造应力, 应力分区, 围岩稳定性, 应力集中

Abstract:

In order to prevent the deformation and failure of roadway surrounding rock and support caused by stress concentration in the process of mining, it is necessary to clarify the distribution characteristics of in-situ stress in the mine field. According to the regional tectonic analysis and plate tectonic movement situation, the dynamic source and evolution characteristics of the stress field formation in Limin coal mine were revealed. Through the in-situ stress test in the mine field, the principal stress direction and value of the in-situ stress field were determined, and the horizontal tectonic stress field of Limin coal mine was identified with the main advantage. The maximum horizontal principal stress direction was S85.78°W-S89.93°W, and the direction was nearly EW. The roof lithology database and rock stress calculation model of the No.9 coal seam were constructed to invert the distribution characteristics of the maximum principal stress in the mine field, and the tectonic stress zoning of the mine field was carried out according to the stress concentration coefficient. The differences in the stability of roadway surrounding rock in different tectonic stress zones were analyzed. The results show that the surrounding rock in the high stress zone changes the most, and the energy accumulation is the most concentrated. The critical scale of stress concentration in roadway surrounding rock is smaller, and strong mine pressure is more likely to occur.

Key words: in-situ stress, tectonic stress, stress zone, stability of surrounding rock, stress concentration

中图分类号:

X936

董海清, 兰天伟, 袁永年, 令向东, 李亚斌, 李阳. 利民煤矿井田地应力场反演及分区特征[J]. 中国安全科学学报, 2023, 33(S2): 105-110.

DONG Haiqing, LAN Tianwei, YUAN Yongnian, LING Xiangdong, LI Yabin, LI Yang. Inversion and zoning characteristics of in-situ stress field in Limin Coal Mine[J]. China Safety Science Journal, 2023, 33(S2): 105-110.

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测孔	主应力类别	主应力值/ MPa	方位角/ (°)	倾角/ (°)
1号	σ₁	20.60	265.78	-9.94
	σ₂	8.38	-33.08	70.05
	σ₃	4.55	178.88	17.12
2号	σ₁	22.40	269.93	-4.98
	σ₂	9.27	-62.07	84.37
	σ₃	7.06	180.16	2.63

测孔	σ_x	σ_y	σ_z	τ_xy	τ_yz	τ_zx
1号	20.2	4.9	8.4	0.9	1.2	2.1
2号	22.3	7.1	9.4	9.7	0.1	1.1

利民煤矿井田地应力场反演及分区特征

Inversion and zoning characteristics of in-situ stress field in Limin Coal Mine

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