厚硬覆岩工作面初次放顶矿山压力实测研究  

Actual Measurement and Research on Mine Pressure During the First Roof Caving of Thick and Hard Overlying Rock Working Face

作　　者：王应启[1] 韩涛 李光宝[1] Wang Yingqi;Han Tao;Li Guangbao(Yankuang Energy Jining No.3 Coal Mine,Shandong Jining 272169)

机构地区：[1]兖矿能源济宁三号煤矿,山东济宁272169

出　　处：《山东煤炭科技》2024年第7期132-135,141,共5页Shandong Coal Science and Technology

摘　　要：通过分析济宁三号煤矿123_(下)01(南)综放工作面地质条件、直接顶的初垮、基本顶的初垮、微震监测等内容,揭示了影响该工作面出现强矿压显现的主要因素为推进速度、上覆厚硬顶板、开采深度、断层等。该工作面初次放顶期间矿压显现特征:直接顶初次垮落步距21.75 m;基本顶初次来压平均步距51 m;动载系数1.41;初次放顶期间矿压显现程度剧烈,基本顶分层分段来压明显,持续时间7个小班;该工作面本次基本顶初次来压整体呈现“中间小两头大”的运动特征。研究所得结论为厚硬覆岩工作面初次放顶强矿压显现准确解释提供了依据。By analyzing the geological conditions,initial collapse of the direct roof,initial collapse of the basic roof,and microseismic monitoring of the 123_(lower)01(South)fully mechanized caving face in Jining No.3 Coal Mine,it is revealed that the main factors affecting the occurrence of strong mine pressure behavior in this working face are advancing speed,overlying thick and hard roof,mining depth,and faults,etc.The characteristics of mine pressure behavior during the initial roof caving period of the working face are as follows:the first collapse step distance of the direct roof is 21.75 m;The average step distance of the initial pressure at the basic roof is 51 m;The dynamic load coefficient is 1.41;During the initial roof caving period,the degree of mine pressure behavior is severe,and the basic roof layering and segmented pressure are obvious,lasting for 7 small shifts;The initial pressure at the basic roof of the working face presents a movement characteristic of"small in the middle and large at both ends"as a whole at this time.The conclusions obtained from the study provide a basis for accurate interpretation of the strong mine pressure behavior during the initial roof caving of thick and hard overlying rock working faces.

关 键 词：综采 覆岩 矿压 实测 

分 类 号：TD323[矿业工程—矿井建设]