【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。更多还原

【Abstract】 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 10degree,the maximum principal stresses are 1.58to 1.84times 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 26.8percent of the main roadway and 66.7percent 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.更多还原