Safety in Coal Mines Articles

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1Optimal Allocation of Bottom Hole Assembly Using in the Construction of Coal Seam Directional Long Drilling1-3,7

2The Influences of Stereo Obstacles on Gas Explosion Characteristics in Horizontal Pipe4-7

3The Method of Determining Reasonable Sealing Length of Gas Extraction Borehole8-10

4Test of Coal Bed Gas Ground Well Extraction Technology in Mining Subsidence Area of Jincheng Mining Area11-13

5The Mathematical Model Establishment of Coal Gas Diffusion Initial Speed △p14-17

6Study on Deflagration Control Methods of Low Concentration Gas Extraction in Tube18-22

7Floor Heave Mechanism and Control Technique on Semi- coal and Semi- rock Roadway Under the Influence of Tectonic Stress23-25

8The Influence of Extremely Thick Key Layer on Pressure - relief Effect of Remote Lower Protective Seam Mining26-29

9Dewatering Test of Floor Aquifers in Deep Mining Area of Coal Mine30-32,36

10Evaluation Method Applying to Miner Thermal Comfort33-36

11Study on the Mechanical Properties of Gangue Filling37-40

12Accuracy and Stability Study of Determining Firmness Coefficient of Coal （Rocks）41-44

13Research on TDLA Algorithms for Locating Tags in Coal Mine45-47

14Experimental Study on BIPB Vulcanization System of Chlorinated Polyethylene Rubber Sheath of Cables48-49,52

15The Technology and Practice of Crossing Especially Big Outburst Holes50-52

16Simulation of Mixing Eveness of Two - component Polyurethane Borehole Sealing Material by CFD Technique53-56

17Gas Control Technology by High Level Gas Drainage Tunnel in Fully Mechanized Caving Face57-59

18Pressure Retaining Sealing Holes Technique of PD Material59-61

19Drilling. Technology of Soft Outburst Coal Seam62-64

20Processing Technology of Drilling Casing Fracture Accident65-67