【摘要】 为了提高巷道的稳定性,需要清楚了解巷道围岩的应力状态。在极限平衡理论的基础上,通过合理的假设,进一步推出了围岩破碎圈半径的理论计算公式。在神火集团的新庄煤矿采用中国矿业大学研制的YZT-Ⅱ型岩层钻孔探测仪进行围岩破碎圈的现场实测,整理出在不同的地质和围岩属性条件下测量的结果,并且对结果作了对比分析,确定了各影响因素对破碎圈的影响程度,证实了理论的正确性,可以指导巷道的支护形式和支护参数的选取。更多还原

【Abstract】 In order to improve the stability of the roadway,the stress state of the surrounding rock should be found out clearly.On the basis of the theory of limiting equilibrium,the paper further deduces the theoretical formula of the fragmentation circle radius in surrounding rock through reasonable hypothesis.Under the guidance of the theory,we make the locating survey of the fragmentation radius in surrounding rock by using the YZT-Ⅱterrane bore detector in the Xinzhuang Mine of the Shenhuo Group,clear up the surverying results in different geologic condition,make a contrastive analysis and confirm influence degree of some factors which confirm the correctness of the theory,and the theory can guide the selection of supporting form and supporting parameter of roadway.更多还原