摘要
巷道上方岩体能否形成某种形式的稳定承载结构,是决定巷道稳定状况及其合理支护形式与参数的主要因素之一。强风化带中的回采巷道,围岩裂隙增多、强度降低,巷道的最大尺寸将受到限制。在保证覆岩成拱的条件下,龙东矿风化带内回采巷道的临界跨度同上覆破碎岩层的厚度成正比,而与巷道的高度成反比,巷道设计、施工过程中必须综合考虑三者之间的合理匹配关系。
Whether the rock mass above the roadway can produce a stable bearing structure in a certain form is one of the major factors that determine the stable condition and the reasonable supporting type and parameter of the roadway. The surrounding rock of the entry in strongly weathered zone has more fissures which lower the rock strength, and the maximum roadway dimension will be limited consequently. Under the condition of guaranteeing the overburden arching, the critical entry span in the weathered zone in Longdong Colliery is in direct proportion to the broken overburden depth but in inverse proportion to the roadway height. Therefore, the reasonable matching relationship among the three factors must be taken into consideration in roadway design and construction.
出处
《金属矿山》
CAS
北大核心
2007年第2期15-18,共4页
Metal Mine
基金
国家自然科学基金项目(编号:50574064
50074029)
