共查询到20条相似文献,搜索用时 62 毫秒
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放顶煤开采放煤参数求解的数学模型 总被引:2,自引:0,他引:2
根据放顶煤开采工作面顶煤冒落的特点,通过相似材料模拟实验,对影响顶煤回收率的放煤步距、放煤口间距等放煤参数进行了研究,建立了求解放煤参数的数学模型,在此基础上对影响放煤参数的因素进行了分析。 相似文献
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本文对近水平厚煤层仰斜放顶煤采煤法的工作面巷道布置、放煤参数、单体液压支柱支护的回采工艺及主要安全技术措施进行了探讨。 相似文献
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本文以虎龙沟煤矿81505工作面为工程背景,通过放矿椭球体理论计算,分析了放煤步距对顶部和采空区侧煤体影响机理,以及不同放煤方式的对比等方式,确定了合理采放比为1:2.64;放煤步距0.8 m;多轮间隔放煤方式。现场实测结果表明应用拟定放煤工艺效益显著,顶煤回收率达90.4%、含矸率21.2%。 相似文献
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介绍了白庙煤矿在27°-32°倾斜不稳定煤层中采用炮采放顶煤开采的技术经验,主要安全技术措施及取得的技术经济效果。 相似文献
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通过对小康矿一采区西三缩采放顶煤工作面采空区气体成分和温度的监测。初步掌握了采区内各种气体成分及温度的成分规律,为综放采空区灭火提供了基础数据。 相似文献
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A typical gateway is analyzed using fully-deformable discrete element method. The fractured zone around the gateway is measured in field. Based on the measurement results and theoretical analysis, a comprehensive support scheme adopting bolt and steel belt is proposed. Discrete element method is used to assess the bolting scheme, and displacement monitoring in field is also carried out. Having been put into practice, it is proved that the scheme is both successful and rational. According to theoretical analysis and monitoring in field, some importan tkeynotes that should be noticed in gateway bolting practice are presented as well. 相似文献
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兖州矿区综采放顶煤技术 总被引:3,自引:0,他引:3
系统地介绍了兖州矿区的综采放顶煤技术,包括综放矿压显现规律、设备优化配置、开采工艺、安全保障技术和采出率保证措施等技术关键.希望能对我国进一步发挥综采放顶煤技术的潜力及综放技术的发展有所贡献. 相似文献
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APPLICATION OF EXPERT SYSTEM BASED ON NEURAL NETWORK IN MINING THE GENTLE INCLINED THICK SEAM 总被引:2,自引:0,他引:2
This paper presents a new method for the correct selection of mining methods and prediction of main technological and economic indexes of the face in the gentle inclined thick seams with the application of the artificial neural network theory and the expert system. The theory analysis and calculating results indicate that the method is reliable, practical and precise. This method has strongly capabilities of self-study and non-linear dynamic data process. It is expected to be widely applied in the policy decision and prediction of mining technology in coal mine. 相似文献
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