lease, shall be turned over, etc., in good condition, etc., etc.— all for the obvious purpose of preserving the shaft and access to coal not mined.
dSTo attempt is made to regulate the rights and obligations of the parties in respect of the superincumbent soil, further than to confer the right of way thereover, and the surface use to the extent necessary to an efficient and economical working of the mine, leaving them to be governed in other respects in reference thereto by the common law.
The rule is well settled, when one owning the whole fee grants the minerals, reserving the surface to himself, his grantee is entitled only to so much of the minerals as he can get without injury to the superincumbent soil. Coleman v. Chadwick, 8 Pa. St. *81; Horner v. Watson, 29 P. F. Smith, 251; Jones v. Wagner, 10 id. 429.; Harris v. Ryding, supra; Zinc Co. v. Franklinite Co. 13 N. J. (2 Beasely’s Ch.) 342; Smart v. Morton, supra*.
And it is held, where a land owner sells the surface, reserving to himself the minerals with power to get them, he must, if he intends to have power to get them in a way which will destroy the surface, frame the reservation in such a way as to show clearly that he is intended to have that power. Hext v. Gill, 7 Law Reports, Chancery Appeal Cases, 699.
But, it is contended, this obligation to protect the super-incumbent soil only extends to the soil in its natural state, and that no obligation rests on the owner of the subjacent strata to support additional buildings, in the absence of express stipulation to that effect. This is, doubtless, true, but “the mere presence of a building or other structure upon the surface does not prevent a recovery for injuries to the surface, unless it is shown that the subsidence would not have occurred except for the presence of the buildings. Where the injury would have resulted, from the act if no buildings existed upon the surface, the act creating the subsidence is wrongful and renders the owners of the mines liable for all damages that result therefrom, as well to the buildings as to