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针对采掘相向条件下沿空掘巷受上工作面采动影响的问题,提出了沿空掘巷平衡支护技术。运用理论力学和数值模拟方法分析巷道围岩的受力与变形,并将3种设计支护方案进行对比分析。结果表明:超前支撑压力和侧向支撑压力在巷道沿空侧应力集中明显;在顶板支护强度相同的条件下,适当减小帮部锚杆间距能够减小两帮移近量;适当增大沿空帮的支护强度,能够促进巷道整体的平衡。针对该支护系统,在实际推广应用中应进一步加大帮部支护强度。
Aiming at the problem that the roadway driving along next goaf affected by face mining under the condition of mining opposite to the roadway, The mechanics and numerical simulation methods are used to analyze the stress and deformation of roadway surrounding rock. Three kinds of design and support schemes are compared and analyzed. The results show that: the advance support pressure and the lateral support pressure are obviously concentrated along the side of the roadway; under the condition of the same roof support strength, the appropriate reduction of the anchor bolt spacing can reduce the two approaches’ Along the help of the intensity of support, can promote the overall balance of the roadway. In view of the support system, in the actual promotion and application should further increase the Ministry of Bangzhu strength.