mollic epipedon

Study on fastly extincting burst technique when tunneling in soft coal seam

松软煤层巷道掘进快速消突技术应用研究

Improving the penetrability of soft coal seam with self-excited oscillation water jet

自激振荡射流改善松软煤层渗透率的机理

Based on analysis about status of coal seam infusion technology and soft coal seam preventing rib spalling technology and used coal’s failure mechanism、strength theory and coal’s wetting mechanism, the mechanism of shallow holes infusion at coal wall preventing rib spalling in soft coal seam was analyzed.

本文在分析国内外煤层注水技术和松软煤层防片帮技术的研究现状的基础上,运用岩石的破坏机理、强度理论和煤的润湿机理等理论知识,分析研究了松软煤层煤壁浅孔注水防片帮技术的机理,通过实验得出对松散煤体不同含水率条件下的力学性质的变化规律,并进行了现场工业性试验,验证了煤壁浅孔注水防止松软煤层煤壁片帮较好的技术效果。

This article gives the calculation formula on smallest support thickness of soft stratum and large cross-section shaft and tunnel combined with the calculation method of road tunnel ground pressure,and calculates the force of support structure by FLAC3D,at last checks the stability of arch walling.

结合公路隧道地压计算方法提出了煤矿松软地层大断面井巷最小支护厚度计算公式,并通过FLAC3D对支护结构进行了受力数值模拟计算,最后对碹体稳定性进行了验算。

Drag bits are used most commonly in soft formations.

在松软岩层中最常用的是钢砂钻头。

Injection of Marysan with Advanced Long Borehole in Soft Rock Stratum

在松软岩层中用超前长钻孔注射马丽散

Malisan Resin Reinforce Roof Technology Being Used in Development in Soft Rocks

马丽散树脂加固顶板技术在松软岩层掘进中的应用

Combined Support Technology with Concrete Sprayed Anchored Net,Anchorage Cable and Backwall Grouting for Large Profile Underground Chamber in Soft Rock

松软岩层内大断面硐室利用锚网喷、锚索、壁后注浆联合支护技术探讨

Full-mechanized Caving Mining Test under Soft Sand Aquifer

松软砂岩含水层下控水综放开采试验

The Experimeat and Application of Some Combined Drift Supports in Weak Rock

松软破碎岩层中巷道联合支护的试验与应用

Predicting Study on Inrush of Sand and Overburden Failure of the Full Mechanized Top-coal Caving under Loosening Sandstone Aquifer in the Tie-bei Coal Mine;

铁北煤矿松软砂岩含水层下综放开采覆岩破坏及溃砂预测研究

Hard strata transmit shock waves more efficiently than loose earth.

质地坚硬的岩层传播震波的效率比松软的土壤高。

The Key Mechanical Parameters Determination of Rock Mass for the Slope Engineering in Red Stratum s Region;

红层软岩边坡关键岩体力学参数确定

Study of measuring the broken zone in soft rock roads in Daye Iron Mine

大冶铁矿软岩巷道围岩松动圈的测试研究

Application of Soft Encircling Rock Supporting Technology in Gaocheng Colliery Wang

松软围岩支护技术在告成煤矿的应用

Characteristics research on drilled soft rocks and similar simulation of soft rock layer

针对钻进的软岩特性研究及软岩地层相似模拟

Any of various mollusks that bore into soft rock or wood.

钻蛀虫钻入松软岩石或木头中的软体动物

Influence of Weak Mudstone Intercalated Layer on Mechanical Properties of Laminated Salt Rock

软弱泥岩夹层对层状盐岩体力学特性影响研究

RESEARCH ON SHEAR CREEP PROPERTY OF TYPICAL WEAK INTERCALATION IN REDBED SOFT ROCK

典型红层软岩软弱夹层剪切蠕变性质研究

Research on Core Drilling in Loose Formation from In-Situ Leaching Sand Uranium Deposit;

地浸砂岩型铀矿松散岩层取心钻进技术研究

Study on Reasonable Width of Coal and Rock Pillar under Thick Aquiferous Loose Bed;

厚含水松散层下煤岩柱合理留设研究

RESERVOIR FLUID PROPERTY IDENTIFICATION OF VOLCANIC ROCK IN SONGNAN GAS FIELD

松南气田火山岩储层流体性质的识别