The karstic fracture water C6 exit point in underground +335m main roadway of Songzao coalmine,because of ittakes in recharging from surface catch-pit,so the maximum inflow of 3500m3/h from the point composed huge threaten tomine safety.
This paper gives an analysis on the water gush mechanism of 241301 heading face, according to its conformation, micro-fracture and fracture network etc, and arrives a conclusion that its gush source is gritstone fractrure water, and micro-fracture and fracture network are as water reposition or channel.
The karstic fracture water C6 exit point in underground +335m main roadway of Songzao coalmine,because of it takes in recharging from surface catch-pit,so the maximum inflow of 3500m3/h from the point composed huge threaten to mine safety.
By investigating the corresponding sufacc in Malan mine and excavate nearby local mine,analysing the water sample and hydrogeology,reaches a conclusion that the source of water is excavator accumulated water of Malan unite mine,and the spoutwater passage is karst crack of K2 ,L4 nearby FM4 1fault.
Then investigating the character of coal bed floor rock mass structure, and using mathematics statistics method, it analyzed crack developing laws, realized the computer simulation of crack network, and put forward a method searching the main inrushing-water channel of coal bed floor.
On the basis, it studied deformation and destruction character of coal bed floor rock mass, analyzed interface slippage deformation and crack extension deformation mechanism of coal bed floor rock mass under the common effects of the different structures of cover rock motion and confined water, arrived the formula calculating the destroying depth of coal bed floor rock mass;
At the boundary term of coal seam floor is certain , studing the related regulations of the thickness of floor rock strata, character of rock, Mine ground pressure, water pressure, the inclination of the faults, the angle of the crack to the floor break.
The relationship between medial crack length and normal loading was also investigated when specimens were indented by symmetrical wedges with interior angles of 30°-120°.
Crack fault quantitative diagnosis based on finite element of B-spline wavelet on the interval
The model-based forward and inverse problems in the diagnosis of structural crack faults were studied.
The forward problem is to solve the natural frequencies through a cracked structural model and the inverse problem is to quantitatively determine the crack parameters using the experimental testing frequencies.
Then, the one-dimensional crack element of B-spline wavelet on the interval (BSWI) was built to solve the forward problem.
he four kinds of conducting－water structure in Sanshandao Gold Deposit are proposed，which are fracture-bridge，lotus root-shaped fracture，V-shaped opening fructure and feather-shaped jointing fracture. Their genesis is approached in detail，and spreading orientation andlocating mechanism of them are probed．The basis of determining project of waterproof engi-neering and mining of deep ore-body are provided.
establishes the physical and mathematical model of gas diffusion and permeation in coal seams,using the oil and natural gas permeation theory in material of pores and fissuers for reference,according to the relerant experimental study,inte-gating it self with the gas flow in coal seams,and analyzes it's character and the direction of study in the future.
Based on analyses of the crack and pore distributions and the variation of water absorption as well as the test results of wetting angle on No. 3 seam in Jincheng , the conclusion that No. 3 seam belongs to the poor seam of permeability and effect of water infusion is reached. Also some methods to improve the water infusion effect of No. 3 seam are put forward in the paper.