Estimation of the height of caved and fractured zones above a longwall panel along with the stability conditions of the goaf area are very crucial to determine the abutment stresses, ground subsidence, and face support as well as designing the surrounding gates and intervening pillars. In this work, the height of caving-fracturing zone above the mined panel is considered as the height of destre...

A powered longwall mining system comprises three basic machines: a shearer, scraper (longwall) conveyor, and roof support. The support as component of complex has two functions. It protects the working from rocks that fall to area where machines people work transports devices in operation proceeds further into seam by means hydraulic actuators are adequately connected controlled or electro-hydr...

In this paper, the capability of determining three dimensional (3D) ground displacements due to underground mining using multiple ALOS PALSAR interferometric pairs acquired with different viewing geometry has been demonstrated in the area of West Cliff colliery, for longwall 32. 3D displacement maps have been derived from four interferometric pairs acquired from two different incidence angles e...

Equipment control functions that were once hardwired are being implemented with software and very large scale integrated (VLSI) devices. Often this transition has resulted in increased flexibility, improved quality, and decreased costs. At the same time, it has created new concerns and challenges concerning worker safety. The visible and welldefined ladder diagram for relay-logic has been repla...

Longwall shearers operating in the underground mine workings move along longwall face conveyor troughs. The haulage system, which is made up of two kinematic pairs form track wheels installed shearer movers, cooperating with toothed route built conveyor’s throughs, responsible for moving shearer. currently used solutions shearers’ systems do not ensure proper cooperation segments, results failu...