CAJ | 학술논문

见方垮落是工作面采空区顶板的一种特殊形式垮落，基于覆岩空间结构理论及薄板结构模型，对其覆岩空间结构特征及形成条件进行研究。顶板见方垮落实质为某关键层初次整体垮落，形式呈正“O-X”破断，其形成条件极为苛刻，需顶板结构及强度、区段煤柱特性、采空区边界条件、工作面宽度、工作面推进距离等因素满足对应关系。判别工作面见方垮落时，需从采区内首采工作面开始，依次计算各工作面回采后关键层的破断情况。工作面宽度越大，关键层见方垮落所需的关键层厚硬程度更高，这是多数工作面所不能满足的，而将冲击地压工作面见方区域均划定为冲击危险区往往偏于保守。
견방과락시공작면채공구정판적일충특수형식과락，기우복암공간결구이론급박판결구모형，대기복암공간결구특정급형성조건진행연구。정판견방과락실질위모관건층초차정체과락，형식정정“O-X”파단，기형성조건겁위가각，수정판결구급강도、구단매주특성、채공구변계조건、공작면관도、공작면추진거리등인소만족대응관계。판별공작면견방과락시，수종채구내수채공작면개시，의차계산각공작면회채후관건층적파단정황。공작면관도월대，관건층견방과락소수적관건층후경정도경고，저시다수공작면소불능만족적，이장충격지압공작면견방구역균화정위충격위험구왕왕편우보수。
Square caving is a special form of collapse in gob roof of working face?Based on the overlying strata spatial structure theory and the thin plate structure model,its spatial strucG tural characteristics and formation conditions are researched?Roof square caving is essentially the initial overall collapse of the key layer with the breaking form of positive “OGX”?The formation conditions for it are extremely harsh,which need many factors to satisfy the correspondence, such as roof structure and its strength,pillar features,goaf boundary conditions,working face width and advance distance?To distinguish the square caving,it needs to calculate in order the collapse characteristics of key strata in each afterGmining face from the initial working face in minG ing area?The larger the width of working face,the thicker and harder the key strata for square caving,which can not be met by majority of working faces,and it is often conservative to deterG mine all the square areas as rock burst hazard areas.