采空区

On the basis of referring the foreign and domestic literatures and systematically generalizing the former research results, firstly, from the adsorption gas, coal spontaneous combustion and the heat resolves, thesis analyzes the ignitable gas occurrence. Secondly, though the experiment station of coal spontaneous combustion, thesis obtains the critical temperature 60 ℃～ 100 ℃, splits temperature 100℃～ 150 ℃, the fission temperature 150℃～ 180 ℃ and the speed-up temperature 210℃～ 250 ℃ and ignitable gas release rules in the several temperatures sections according to the results. Finally according to fire resource and the catastrophe theory, ignitable gas explosion characteristic and the influence factors have been conducted of the qualitative investigation and the quantitative determination. The gas explosion control technologies are put forward. It has built the certain foundation for the effective prevention gas explosion accident occurrence.

本论文采用理论分析和实验模拟相结合的综合研究方法，首先从煤层吸附瓦斯、煤氧复合过程及煤高温热解三方面对采空区可燃性气体的产生进行分析；其次通过对大型煤自然发火实验测试台的应用，根据实验结果得到临界温度60℃～100℃、干裂温度100℃～150℃、裂变温度150℃～180℃和增速温度210℃～250℃等几个温度段的可燃性气体释放规律；最后根据爆炸引火源，结合瓦斯爆炸流变-突变理论，对可燃性气体爆炸特性及影响因素进行了定性研究和定量测定，提出瓦斯爆炸事故的控制对策，为有效预防瓦斯爆炸事故的发生打下了一定的基础。

With frangible environment and lack of land, water and forest in karsts lava region, it encounters technologic challenges to ecological rehabilitation of opencast mine region by traditional methods.

喀斯特岩溶地区缺土缺水缺林、生态环境脆弱，传统的复垦方法对采空区进行生态恢复难度很大，菌根技术在喀斯特岩溶矿区生态恢复中具有重要意义。

The rearch result of this subject has important guidance meaning to insure the minings long safety of lower mined area in Paomaping.

本课题的研究成果对云南金鼎锌业有限公司跑马坪矿采空区下部采矿作业的长久安全性具有一定的指导意义。

There is important significance for guiding preventing and putting out fire and safety production that marking off danger zero of coal spontaneous combustion in goaf exactly and doping coal burning period and the distributing chart of high temperature spot.

准确的划出采空区浮煤自燃的危险区域，预测出回采时，煤自燃的发火期及高温点的分布，对指导煤矿防灭火和安全生产具有重要意义。

Timely shut-up of the worked-out sections or worn-out pits or lanes that will be set aside temporarily

及时封闭采空区和已经报废或者暂时不用的井巷

The full tail sand grouting filling system at zhangmatun iron mine is to adopt tailings after two stage dewatering from washing plant,make homogeneous grouting filling material with high density from mixing full tail sand,cement and water through stirring and form bulk and low grade grouting body with strong solidity,filling in gob taking pipe full self-flowing transport way.

马屯铁矿全尾砂胶结充填系统采用选矿厂两段脱水后的尾矿，通过搅拌将全尾砂与水泥、水混合制成高浓度均质胶结充填料，以管道全自流输送方式充入采空区，形成整体性强的大体积低标号胶结体。

Research on application of downward ventilation to coal mining face in horizontal seam with coal outburst in potential

结果表明，在采用下行通风后，采空区绝对瓦斯涌出量为上行风时的80%，工作面φ(CH4)下降了75%，瓦斯不再超限。

Through methane simulation experiment on ignition and blasting due to seam roof rock friction in Qinshui Coal Mining District of Yangcheng, it is shown that sparks will be generated through friction while caving ,causing gas and water mixture to fire, it is big hidden sources which cause methane blasting accident in goaf.

通过对阳城沁水矿区煤层顶板岩石相互摩擦引燃引爆瓦斯模拟实验，得出&岩石在冒落过程中相互撞击摩擦产生火花，可能引起瓦斯与空气混合物着火，是造成采空区瓦斯爆炸事故引爆源&的结论。

High pressure revolving water jet technology has an obvious advantage in drilling large hole diameter and long continuous holes and is also characterized by high efficiency,energy saving,large and regular borehole,high rock-breaking efficiency when drilling coal seams.

高压旋转水射流技术在钻大井径、长连续孔方面具有明显优势，在煤层中钻井又具有高效、节能、钻孔大、成孔规则、破岩效率高等优点，因此在煤层气地面径向水平井技术和井下采空区钻长直井技术中广为应用。

According to field investigations and the results obtained by in-situ stress and strain measurements, some conclusions about the phenomena and mechanism of the rock pressure were drawn, and it was found that

根据现场调查，以及应力和位移测量的结果，得出了地压活动发生机制的一般规律，并指出：产生大面积地压活动最主要的原因是采空区中矿柱的破坏和倒塌。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。