The explosive was a mixture of gelignite and ammonal. In June the gallery was finished and charged with of ammonal. Clarke's machine would use a hydraulic ram to insert cylinders of ammonal explosive about underground. The filling was composed mostly of home-made explosives, either cheddite or ammonal. The mine was loaded with of ammonal in two charges of and . Canadian, Australian, New Zealand and British miners laid 26 mines with of ammonal explosive. The mine was loaded with of ammonal, divided in two charges of and . Just north of the village, Y Sap mine was charged with of Ammonal. About of ammonal was placed in the chamber beneath the "Y Sap" mine. Lochnagar was loaded with of Ammonal, in two charges of and , apart and deep. Ammonal remains in use as an industrial explosive. "Lochnagar" was loaded with of ammonal, in two charges of and , apart and deep. Just north of the ruined village, the "Y Sap" mine was charged with of ammonal. About of ammonal was placed in the chamber under Y Sap (the "Blinddarm").