METHOD OF CONTROL OF STATE OF MINE WORKINGS Russian patent published in 2008 - IPC E21C39/00 

FIELD: mining.

SUBSTANCE: invention relates to mining, namely to control of the state of the formation massif round mine workings. The method includes measurements during displacements of marginal formations at the workings area under control relative to the reference element, which is a guide to the state of marginal formations round mine workings. A number of paired points of measurements are marked preliminarily over the contour of mine workings on the reversed arrangement basis as elements for measuring displacements. The axis of the beam from the light source located in the working space of the mine beyond the zone of influence of the said displacements is used as the reference element, the light beam being orientated along the workings area under control. Distances between paired points of measurement over the contour of the area of mine workings under control are measured in initial state. These distances are measured regularly at certain intervals assigned; when taking these measurements first the distance from one point of measurement in each pair to the beam axis is measured, next the distance from the beam axis to the other appropriate paired point is measured, then the numerical values obtained are summed up at each time interval and the sums of values of distances between the points of each pair are compared with the distance between relevant points of measurements in each pair measured in initial state, thus obtaining absolute values of displacements of formations. The increase of stresses in the marginal formation massif round the mine workings is evaluated by the rate of increments of these values.

EFFECT: reduction of labour consumption, expenses for conducting control over then state of mine workings, increase of operational efficiency and informativity of control.

2 cl, 3 dwg