METHOD FOR ANCHORAGE OF MINES Russian patent published in 2012 - IPC E21D20/00 

FIELD: mining.

SUBSTANCE: method for anchorage of mines, preferably in soft country rocks, includes drilling of blast holes into country rocks of the mine and installation of steel polymer anchors into them with fixation of their rods along the entire length of blast holes by ampoules with hardening mixtures that have different hardening time. After forecasting determination of a border of a zone of disturbed country rocks from arrangement of the mine, dynamic exposure is ensured for disturbed country rocks around the mine in the specified zone under conditions of mining pressure development, for this purpose blast holes are drilled perpendicularly to the mine contour to the border of the specified zone, the depth part of each one is filled with ampoules of expanding mixture with retarded hardening, and the remaining part of the blast hole - with ampoules of quick-setting mixtures. The last ampoule installed in the blast hole mouth is the ampoule with least time of hardening of the quick-setting mixture with gradual increase of hardening time of quick-setting mixture of each ampoule installed ahead in this part of the blast hole relative to the last ampoule. When anchors are installed into blast holes, and ampoules in them with the specified hardening mixtures are damaged as a result of expansion in process of ampoule hardening mixtures hardening along the entire length of blast holes with simultaneous transfer of pressure at the same time that varies in its value to the disturbed country rocks, the specified force action is developed at the specified rocks so that it is possible to form rock blocks around the anchors from strengthened rocks along the mine contour, coupled with each other by side surfaces, each of which acquires the shape of prism in cross section in the form of a trapezoid in the plane of the mine section, besides, the larger base of the trapezoid is limited with the border of the zone of disturbed country rocks, and its smaller base - with the mine contour. In process of subsequent exposure of the rock pressure, the specified rock blocks are self-wedged, which increases their compression between each other, thus providing for stable condition of country rocks that surround the mine.

EFFECT: invention provides for stable condition of country rocks that surround the mine, higher efficiency of anchorage of mines due to prevention of displacements in disturbed country rocks in the mine section, stipulated by increasing their stability.

2 cl, 4 dwg