采场地应力分布规律及对巷道围岩稳定性影响分析  

Analysis of working area stress distribution law and its impact on stability of the surrounding rock of roadway

作　　者：周学斌[1] 郑腾龙[2,3] 

机构地区：[1]淮北矿业集团公司桃园煤矿,安徽宿州234116 [2]安徽理工大学土木建筑学院,安徽淮南232001 [3]中煤矿山建设集团有限责任公司,安徽合肥230601

出　　处：《安徽建筑工业学院学报（自然科学版）》2013年第4期9-13,共5页Journal of Anhui Institute of Architecture(Natural Science)

摘　　要：采用空芯包体应力法对桃园煤矿二水平地应力大小和方向进行了现场测试,由实测结果可知,二水平岩体地应力场宏观上属于水平构造应力场,最大和最小主应力倾角均值小于10°,最大主应力是最小主应力的1.58～1.84倍,中间主应力与垂直应力较为接近,随埋深的增加垂直应力相应增大。依据巷道轴向与最大水平主应力方向倾斜程度,对二水平采区主要巷道进行了稳定性分析,26.8%的主要大巷和66.7%的采区巷道受最大水平主应力影响为3级,表明主要大巷布置较为理想,而采区巷道矿压显现剧烈,还有较大的优化空间。This paper test the magnitude and direction of the second plane strata stress in Taoyuan coal mine by hollow inclusion stress method. The results show that the second plane strata stress field is horizontal tectonic stress field in the macro level, the mean inclination of the maximum and minimum principal stresses is less than 10 degree, the maximum principal stresses are 1.58 to 1.84 times as large as the minimum principal stresses, the intermediate principal stresses are closer to the vertical stresses which increased with the stratum depth accordingly. Based on the tilt of roadway axial direction and the maximum horizontal principal stress, this paper analyzed the stability of the major roadways in second plane working area, and find that the maximum principal stress impact on 26.8 percent of the main roadway and 66.7 percent of＇the working area roadway is three-level. The results show that the main roadways with satisfactory distribution, but ground pressure of the roadways in working area appear sharply, there is a large optimization space.

关 键 词：地应力测试 空芯包体应力法 矿井深部巷道 稳定性 

分 类 号：TD325.4[矿业工程—矿井建设]